Scanner tower



FIG. 1 is a front view of the scanner tower;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a reduced rear perspective view thereof. 

The ornamental design for a scanner tower, as shown and described. 